CN114759954B - Wheel-rail force wireless detection device - Google Patents

Abstract

The invention discloses a wheel-rail force wireless detection device. It includes: the signal acquisition module is used for being mounted on wheels of a bogie of a railway vehicle to acquire wheel strain signals and sending the wheel strain signals to the signal acquisition module through a signal transmission line; the signal acquisition module is used for being arranged on a wheel shaft between wheel pairs of the bogie and synchronously rotating along with the wheel shaft, and wirelessly transmitting an acquired signal to the signal receiving module; the signal receiving module is used for being installed on a bogie frame which is positioned in the side direction of the wheel shaft in the bogie and wirelessly receiving the signal sent by the signal acquisition module; and the result generating module is used for processing the signal received by the signal receiving module and generating a wheel-rail force detection result. The signal acquisition module is used for transmitting the signals to the signal receiving module on the steering frame in a short-distance wireless transmission mode, so that a slip ring is avoided.

Description

A wireless detection device for wheel-rail force

technical field

The invention relates to the wheel-rail force detection technology of rail vehicles, in particular to a wheel-rail force wireless detection device.

Background technique

Wheel-rail force testing is an important part of dynamic testing of rail vehicles. In the existing rail vehicle wheel-rail force detection method (for example, the detection method disclosed in the patent document with publication number CN113155330A), the strain signal is output from the measuring bridge circuit composed of a resistance strain gauge pasted on the wheel web of the vehicle bogie, Then, the signal is transmitted to the signal processing system on the vehicle through the signal transmission line through the collecting ring installed at the end of the wheel axle, and the signal processing system generates the detection result after signal amplification and other processing. The main problems of the above detection methods are: the installation of the collector ring needs to punch the wheel shaft (see Figure 5 in the above-mentioned patent literature description), which affects the structural strength and service life of the wheelset; analog signals are carried out through the collector ring and the signal transmission line. The transmission will introduce noise and affect the detection accuracy.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a wheel-rail force wireless detection device, which can send the wheel strain signal to the signal receiving module on the bogie frame by short-distance wireless transmission through the signal acquisition module installed on the wheel axle, thereby avoiding the use of integrated flow ring.

According to one aspect of the present invention, a wireless detection device for wheel-rail force is provided. It includes: a signal acquisition module, which is used for being installed on the wheel of the bogie of the rail vehicle to acquire the wheel strain signal, and sends the signal to the signal acquisition module through the signal transmission line; the signal acquisition module, the signal acquisition module is used for The wheel shaft installed between the wheel pairs of the bogie rotates synchronously with the wheel shaft, and wirelessly sends the collected signal to the signal receiving module; the signal receiving module is used for being installed in the bogie and located at the on the bogie frame on the side of the wheel axle, and wirelessly receive the signal sent by the signal acquisition module; the result generation module, the result generation module is used to process the signal received by the signal receiving module, and generate the wheel-rail force detection result ; wherein, the signal acquisition module transmits signals through a wireless communication induction coil that is coaxially arranged with the wheel shaft and rotates synchronously with the wheel shaft in the signal collection module, and the signal receiving module has the function of keeping the wireless communication induction coil with the wireless communication induction coil. Set the distance of the wireless signal receiving probe.

The above-mentioned wheel-rail force wireless detection device can send the wheel strain signal to the signal receiving module on the bogie frame by short-distance wireless transmission through the signal acquisition module installed on the wheel axle, thereby avoiding the use of slip rings. The short-distance wireless transmission method has less signal interference, which helps to improve the detection accuracy.

Optionally, the signal receiving module includes a cantilever support, the rear part of the cantilever support is mounted on the bogie frame, and the front part of the cantilever support extends toward the signal acquisition module , the wireless signal receiving probe is installed at the front of the cantilever support.

Optionally, the cantilever support includes a bracket formed by welding and/or casting from a plurality of plate-shaped structures, the bracket includes: a first plate-shaped structure, the first plate-shaped structure is arranged along a first plane, the first plane is a vertical plane and the normal of the first plane points to the signal acquisition module; a second plate-shaped structure, the second plate-shaped structure is arranged along the second plane and connected to the first The front side of the plate-shaped structure, the second plane is a horizontal plane and perpendicular to the first plane; the third plate-shaped structure, the third plate-shaped structure is arranged along the third plane and connected to the first plate-shaped structure The front side of the structure and the right side of the second plate-shaped structure, the third plane is a vertical plane and is respectively perpendicular to the first plane and the second plane; the fourth plate-shaped structure, the third plane The four-plate structure is disposed along a fourth plane and connected to the front side of the first plate structure and the left side of the second plate structure, and the fourth plane is a vertical plane and is respectively connected with the first plate structure. The plane is perpendicular to the second plane; a fifth plate-shaped structure, the fifth plate-shaped structure is arranged along the fifth plane and is connected to the rear side of the first plate-shaped structure and is close to the first plate-shaped structure On the upper end, the fifth plane is a horizontal plane and is perpendicular to the first plane; wherein, the front end of the second plate-shaped structure is adapted to be connected with the wireless signal receiving probe, and the first plate-shaped structure is used for The fifth plate-shaped structure is adapted to be connected with the side positioning platform on the bogie frame through the fastening bolts installed perpendicular to the first plane, and the fifth plate-shaped structure is used for fastening through the vertical installation of the fifth plane. The bolts are adapted and connected to the top positioning platform on the bogie frame, and the fifth plate-shaped structure is further provided with a snap-fit structure for snap-fit with the top positioning platform, the snap-fit structure at least The fifth plate-shaped structure can be limited forward, backward and downward.

Optionally, in the bracket, the snap connection structure includes a positioning groove provided on the bottom plane of the fifth plate-shaped structure and extending in the left-right direction, and the positioning groove is used for connecting with the positioning groove provided on the top surface. The positioning flange on the positioning platform is snap-fitted. Optionally, in the bracket, the upper and lower edges of the third plate-shaped structure and/or the fourth plate-shaped structure are arc-shaped, so that the third plate-shaped structure and/or the fourth plate-shaped structure The width of the structure gradually decreases from back to front. Optionally, in the bracket, weight reduction holes are arranged on the first plate-shaped structure and/or the second plate-shaped structure. Optionally, in the bracket, a reinforcing rib is connected between the first plate-shaped structure and the second plate-shaped structure.

Optionally, the signal acquisition module performs wireless charging through a wireless charging induction coil in the signal acquisition module that is coaxially disposed with the wheel shaft and rotates synchronously with the wheel shaft; A wireless charging probe with a charging induction coil that maintains a set distance.

Optionally, the signal receiving module includes a cantilever support, the rear part of the cantilever support is mounted on the bogie frame, and the front part of the cantilever support extends toward the signal acquisition module and, the wireless charging probe is installed on the left or right side of the front part of the cantilever support, and the wireless signal receiving probe is installed on the front part of the cantilever support and located on the wireless charging probe On the side of the wireless signal receiving probe, the front-end working part of the wireless signal receiving probe is located at the side and rear of the front-end working part of the wireless charging probe.

Optionally, the signal acquisition module adopts a rotary shaft-mounted sensor, and the rotary shaft-mounted sensor includes: a shaft-mounted fixing mechanism, and the shaft-mounted fixing mechanism includes a collar, and the collar is connected by two semi-ring bases. The two semi-annular bases are formed by butting together and form a collar hole for tightly fitting with the wheel axle. The two semi-annular bases are both provided with annular grooves. After the two semi-annular bases are butted, the annular The card slots are connected to form a ring card slot, and a circuit installation slot is opened on at least one semi-ring base in the collar; a wireless transmission mechanism, the wireless transmission mechanism includes a first wire reel and the wireless communication induction coil, the first The wire reel is an annular structure made of insulating material, and the inner edge is provided with an annular snap connection structure and the outer edge is provided with an annular wiring groove. Corresponding to the annular card slot, the annular wiring slot of the first wire reel is used to arrange the wireless communication induction coil. The signal receiving end of the circuit is used for connecting with the signal acquisition module through the first transmission line, and the signal sending end of the signal transceiving and processing circuit is used for connecting with the wireless communication induction coil through the second transmission line.

Optionally, the wireless transmission mechanism further includes a wireless charging induction coil, the wireless charging induction coil is configured to be connected to the power supply of the signal transceiving and processing circuit through a third transmission line, and the wireless charging induction coil is performed in one of the following ways: The second method is provided in the wireless transmission mechanism; the first method: the first reel is provided with two annular wiring slots, the two annular wiring slots are independent of each other, and the wireless charging induction coil is arranged in the corresponding annular wiring groove on the first wire reel; method 2: the wireless transmission mechanism includes a second wire reel, the second wire reel is an annular structure made of insulating material and an annular clip is arranged on the inner edge The outer edge is provided with an annular wiring groove, the annular clamping structure of the second wire reel is used for clamping and fitting with the corresponding annular clamping groove of the collar, and the annular wiring groove of the second wire reel is used for The wireless charging induction coil is arranged.

Optionally, the first spool and the second spool are respectively disposed at opposite ends of the collar. Optionally, the first spool and/or the second spool is formed by splicing two semi-annular structures, and the splicing surface between the two semi-annular structures and the two semi-annular bases alignment of the butt surfaces. Optionally, if the first spool and/or the second spool are cut with a plane defined by the center line of the collar hole and a radial line perpendicular to the center line at the same time If the cross section formed on the first spool and/or the second spool is a cross-section, the cross-sectional shape of the annular clamping structure of the first spool and/or the second spool is an earth-shape.

Optionally, any one of the two semi-annular bases is provided with a shoulder protruding from the outer cylindrical surface of the semi-annular base at the docking part used for butt joint with the other semi-annular base, and the A threaded connector mounting hole is arranged in the shoulder, and the two butt joint parts are connected by a threaded connector installed in their threaded connector mounting hole and an anti-loosening mechanism connected with the threaded connector .

Optionally, one of the two semi-annular bases is provided with a sinking groove recessed on the outer cylindrical surface of the semi-annular base at the docking part used for butt joint with the other semi-annular base. There are threaded connector mounting holes in the middle and another docking part that is butted with the docking part where the sink is located. The connecting piece is connected with the anti-loosening mechanism connected with the threaded connecting piece.

Optionally, the wireless transmission mechanism is provided at the end of the collar; the shaft-mounted fixing mechanism further includes a cover plate installed on the outer cylindrical surface of the collar, the cover plate is used to cover the The circuit installation groove makes the entire outer surface of the rotary shaft-mounted sensor outside the wireless transmission mechanism to be a cylindrical surface.

The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Additional aspects and advantages of the present invention will be set forth, in part, from the following description, and in part will be apparent from the following description, or learned by practice.

Description of drawings

The accompanying drawings constituting a part of this specification are used to assist the understanding of the present invention, and the content provided in the accompanying drawings and their related descriptions in this specification can be used to explain the present invention, but do not constitute an improper limitation of the present invention.

FIG. 1 is a schematic structural diagram of a wireless force measuring wheelset according to an embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a rotary shaft mounted sensor according to an embodiment of the present invention.

FIG. 3 is a schematic structural diagram of the rotary shaft-mounted sensor shown in FIG. 2 after the semicircular cover plate is removed.

FIG. 4 is a schematic structural diagram of one half of the rotary shaft-mounted sensor shown in FIG. 2 .

FIG. 5 is a schematic structural diagram of a rotary shaft mounted sensor according to an embodiment of the present invention.

FIG. 6 is a schematic structural diagram of a rotary shaft-mounted sensor according to an embodiment of the present invention.

FIG. 7 is a schematic structural diagram of a cantilever support according to an embodiment of the present invention.

FIG. 8 is a schematic diagram of signal transmission of a device for wireless detection of wheel-rail force according to an embodiment of the present invention.

Marked in the figure: bogie 10, wheel-rail force wireless detection device 20, wheel set 11, bogie frame 12, side positioning platform 121, top positioning platform 122, positioning flange 122a, wheels 111, axles 112, signal acquisition Module 21, signal receiving module 22, shaft fixing mechanism 211, collar 2111, semi-ring base 2112, sink 2112a, shoulder 2112b, threaded connector mounting hole 2112c, collar hole 2113, annular slot 2114, circuit installation Slot 2115, first wiring channel 2116, second wiring channel 2117, cover plate 2118, half-ring cover plate 2119, wireless transmission mechanism 212, first wire reel 2121, annular snap structure 2122, side plate 2122a, annular wiring groove 2123 , the third wiring channel 2124, the fourth wiring channel 2125, the second reel 2126, the semi-ring structure 2127, the cantilever support 221, the wireless signal receiving probe 222, the wireless charging probe 223, the cable fixing structure 224, the first plate-shaped structure 2211, second plate structure 2212, third plate structure 2213, fourth plate structure 2214, fifth plate structure 2215, positioning groove 2215a, weight reduction hole 2216, reinforcing rib 2217, wireless charging probe mounting platform 2212a , a wireless signal receiving probe installation gap 2212b, and a wireless signal receiving probe installation platform 2212c.

Detailed ways

The present invention will be clearly and completely described below with reference to the accompanying drawings. Those of ordinary skill in the art will be able to implement the present invention based on these descriptions. Before the present invention is described in conjunction with the accompanying drawings, it should be specially pointed out that the technical solutions and technical features provided in each part including the following descriptions, under the condition of no conflict, can be combined with each other. In addition, where possible, these technical solutions, technical features and related combinations can be assigned specific technical subjects and protected by related patents.

The embodiments of the present invention involved in the following description are usually only a part of the embodiments rather than all the embodiments, based on these embodiments, all other embodiments obtained by those of ordinary skill in the art without creative work , should belong to the scope of patent protection.

Regarding terms and units in this specification: The terms "comprising", "comprising", "having" and any variations thereof in this specification and corresponding claims and related parts are intended to cover non-exclusive inclusion. The terms "front", "rear", "left", and "right" in this specification and the corresponding claims and related parts represent relative positional relationships based on the drawings. In addition, other related terms and units can be reasonably explained based on the relevant content provided in this specification.

FIG. 1 is a schematic structural diagram of a wireless force measuring wheelset according to an embodiment of the present invention. The wireless force-measuring wheelset is mainly composed of the bogie 10 of the rail vehicle and the wheel-rail force wireless detection device 20 .

The bogie 10 includes a wheel set 11 and a bogie frame 12 , the wheel set 11 includes a pair of wheels 111 and a wheel axle 112 , and the wheel axle 112 is mounted on the bogie frame 12 through a bearing. During the operation of the rail vehicle, the wheelset 11 rolls on the track, and the wheelset 11 rotates relative to the bogie frame 12 .

In the past, in the wheel-rail force detection, in order to output the strain signal generated on the rotating wheel 111 through the signal transmission line (specifically, it can be obtained by a measuring bridge circuit composed of a resistance strain gauge attached to the wheel web), it is necessary to connect the wheel shaft 112 to the output. A collector ring is installed at the end of the shaft, which causes the following problems: First, the installation of the flow ring requires drilling holes on the wheel shaft, which affects the structural strength and service life of the wheelset; second, the simulation is performed through the collector ring and the signal transmission line. The transmission of the signal will introduce noise and affect the detection accuracy.

However, the wireless force measuring wheelset of the embodiment of the present invention adopts a wheel-rail force wireless detection device 20, which can avoid the use of a collector ring.

FIG. 1 shows a wireless detection device for wheel-rail force according to an embodiment of the present invention. FIG. 8 is a schematic diagram of signal transmission of a device for wireless detection of wheel-rail force according to an embodiment of the present invention. As shown in FIG. 1 and FIG. 8 , the wheel-rail force wireless detection device 20 specifically includes: a signal acquisition module (not shown in the figure), a signal acquisition module 21 , a signal reception module 22 and a result generation module (not shown in the figure).

Wherein, the signal acquisition module is used for being installed on the wheel 111 of the bogie 10 of the rail vehicle to acquire the wheel 111 strain signal, and send it to the signal acquisition module 21 through the signal transmission line. The signal acquisition module can use a strain gauge measurement circuit, such as a measurement bridge circuit composed of resistance strain gauges.

The signal acquisition module 21 is used for being installed on the axle 112 between the wheelsets 11 of the bogie 10 to rotate synchronously with the axle 112 , and to wirelessly send the acquisition signal to the signal receiving module 22 .

Wherein, the signal receiving module 22 is used for being installed on the bogie frame 12 of the bogie 10 which is located on the side of the axle 112 , and wirelessly receives the signal sent by the signal collecting module 21 .

It can be seen that the signal acquisition module 21 is connected to the signal acquisition module through a signal transmission line to acquire the strain signal sent by the signal acquisition module; then, the signal acquisition module 21 wirelessly sends the information collected by the signal acquisition module 21 to the signal reception module 22 .

Generally speaking, after the signal acquisition module 21 receives the strain signal (usually an analog signal) sent from the signal acquisition module, it will first perform signal amplification, AD conversion (that is, convert the analog signal into a digital signal), and data encoding, etc., and then Then, the processed information is wirelessly sent to the signal receiving module 22 . The signal receiving module 22 can perform data decoding after receiving the information from the signal collecting module 21 . In this way, the amplification and AD conversion of the strain signal of the wheel 111 can be completed on the wireless force measuring wheel pair, and the distance between the signal acquisition module 21 and the signal receiving module 22 is relatively close, so it is helpful to reduce the interference in the process of information transmission. , to improve the test accuracy.

Wherein, the result generating module is used for processing the information received by the signal receiving module 21 and generating the wheel-rail force detection result. The result generation module may include at least one processor, at least one memory, and at least one communication interface. The processor and the memory are connected to the communication interface, for example, through various types of interfaces, transmission lines or buses. Optionally, the result generating module may further include an input device and an output device.

The processor may include a central processing unit (CPU), a digital signal processor (DSP), a microprocessor, an Application Special Integrated Circuit (ASIC), a microcontroller (MCU), a field programmable gate array (FPGA) Or one or more integrated circuits for implementing logical operations. The processor may be used to implement required functions for the result generating module, eg for implementing required signal processing for the result generating module.

Memory may include mass storage for data or instructions. By way of example and not limitation, memory may include a Hard Disk Drive (HDD), floppy disk drive, flash memory, optical disk, magneto-optical disk, magnetic tape or Universal Serial Bus (USB) drive or two or more a combination of more than one of these. Storage may include removable or non-removable (or fixed) media, where appropriate. Memory may be internal or external to the processor, where appropriate. In certain embodiments, the memory is non-volatile solid state memory. In certain embodiments, the memory includes a read only memory (ROM); where appropriate, the ROM may be a mask programmed ROM, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), Electrically Rewritable ROM (EAROM) or Flash memory or a combination of two or more of the above. The memory can be used to store wheel-rail force detection result data and computer programs or instructions, which can be executed by the processor to implement the functions required by the result generating module.

The communication interface is used to connect the result generating module with the signal receiving module 22 through a communication link. The input device communicates with the processor and can accept user input in a variety of ways. For example, the input device may be a mouse, keyboard, touch screen device or sensor. The output device communicates with the processor and can display information in a variety of ways. For example, the output device may be a liquid crystal display, a light emitting diode display device, a cathode ray tube display device, a projector, or the like. The result generating module can display the wheel-rail force detection result through the output device.

The above-mentioned signal acquisition module 21 and/or signal receiving module 22 may also include required parts such as a processor, a memory, and a communication interface. These processors, memories, and communication interfaces can be referred to above. The signal transceiver processing circuit in the signal acquisition module 21 can implement functions such as signal amplification, AD conversion, and data encoding through a corresponding processor. Similarly, the signal receiving module 21 can implement functions such as data decoding through a corresponding processor.

The signal acquisition module 21 and the signal receiving module 22 may adopt various short-range wireless transmission schemes to realize wireless communication, such as RFID (non-contact radio frequency identification), NFC (near field communication) technology, and the like.

The above-mentioned signal receiving module 22 may include an independent controller, which may be deployed on the vehicle. Some processors, memories, communication interfaces, etc. in the signal receiving module 22 can be deployed in the controller, and the controller can be used to control the wireless signal receiving probe 222 and the wireless charging probe 223 in the signal receiving module 22 (hereinafter referred to as the wireless charging probe 223). These probes are explained). In addition, the result generating module can also receive the information sent by the signal receiving module 22 through the controller.

The specific structure of the signal acquisition module is as follows.

FIG. 2 is a schematic structural diagram of a rotary shaft mounted sensor according to an embodiment of the present invention. FIG. 3 is a schematic structural diagram of the rotary shaft mounted sensor shown in FIG. 2 after the semicircular cover plate 2119 is uncovered. FIG. 4 is a schematic structural diagram of one half of the rotary shaft-mounted sensor shown in FIG. 2 . As shown in FIGS. 2-4 , the signal acquisition module 21 in the wheel-rail force wireless detection device of the present invention can adopt the following rotary shaft-mounted sensor: the rotary shaft-mounted sensor is used to be installed on the wheel shaft 112 to rotate synchronously with the wheel shaft 112 The collected signal is wirelessly sent to the signal receiving module 22 , which includes a shaft-mounted fixing mechanism 211 and a wireless transmission mechanism 212 .

Wherein, the shaft mounting and fixing mechanism 211 includes a collar 2111, the collar 2111 is formed by butting two semi-annular bases 2112 through a connecting piece and forms a collar hole 2113 for tightly fitting with the axle 112, so The two semi-annular base bodies 2112 are both provided with a circular groove, and after the two semi-annular bases 2112 are butted together, the annular groove 2114 is formed by butt joints between them. At least one half of the collar 2111 The annular base body 2112 is provided with a circuit mounting groove 2115 .

The wireless transmission mechanism 212 includes a first wire reel 2121 and a wireless communication induction coil (not shown in the figure). The first wire reel 2121 is a ring-shaped structure made of insulating material and has a ring-shaped clip on the inner edge. structure 2122 and an annular wiring groove 2123 is provided on the outer edge. The annular clamping structure 2122 of the first wire reel 2121 is used for clamping and fitting with the corresponding annular clamping groove 2114 of the collar 2111. The first wire The annular wiring groove 2123 of the disk 2121 is used for arranging the wireless communication induction coil.

In addition, the circuit installation slot 2115 is used to install a signal transceiving and processing circuit, and the signal receiving end of the signal transceiving and processing circuit is used for connecting with the target mechanism (the target mechanism here is obviously connected to the axle 112) through the first transmission line. It means that the signal acquisition module on the wheel 111) is connected, and the signal transmitting end of the signal transceiving and processing circuit is used for connecting with the wireless communication induction coil through the second transmission line. "Transmission line" refers to any form of parts that can realize the function of wired transmission of signals.

The above-mentioned rotating shaft-mounted sensor can be installed on the wheel axle 112 by means of "clamping", which does not damage the wheel axle 112 and does not affect the structural strength and service life of the wheelset. The wireless communication induction coil configured by the first wire reel 2121 can be coaxially arranged with the wheel shaft 112, therefore, when the rotating shaft-mounted sensor rotates with the wheel shaft 112, the distance between the wireless communication induction coil and the wireless signal receiving probe 222 is not substantially changed Therefore, the acquisition signal can be continuously output wirelessly.

The two semi-annular bases 2112 of the collar 2111 can preferably be made of light-weight, high-rigidity and high-strength materials. For example, the semi-ring base 2112 can be made of hard aluminum alloy.

Generally speaking, on the collar 2111 , the circuit mounting groove 2115 is formed on the outer cylindrical surface of the at least one semi-ring base 2112 , and the annular clamping groove is formed on the side of the circuit mounting groove 2115 . In this way, the interference between the annular card slot and the circuit mounting slot 2115 can be avoided, and the space on the outer cylindrical surface of the semi-ring base 2112 can be exploited to a greater extent to set the circuit mounting slot 2115 .

Wherein, a first wiring channel 2116 for arranging the first transmission line and/or a second wiring channel 2117 for arranging the second transmission line may be respectively opened on the side wall of the circuit mounting groove 2115 . Therefore, the first transmission line and the second transmission line can be routed through the wiring channel on the side of the circuit installation slot 2115, so as to reduce the exposure of the first transmission line and the second transmission line, so that the surface of the rotating shaft-mounted sensor is more concise and smooth. The first transmission line and the second transmission line can be better protected, and in addition, the rotating shaft mounted sensor experiences less airflow resistance when rotating with the axle 112 at high speed.

Wherein, a third wiring channel 2124 for arranging the second transmission line can be opened on the first wire reel 2121, and the annular clamping structure 2122 of the first wire reel 2121 is locked with the annular clamping groove 2114 of the collar 2111 After fitting, the third wiring channel 2124 communicates with the second wiring channel 2117 .

Wherein, a fourth wiring channel 2125 for arranging the first transmission line can be opened on the first wire reel 2121, and the annular clamping structure 2122 of the first wire reel 2121 is locked with the annular clamping groove 2114 of the collar 2111 After the connection is made, the fourth wiring channel 2125 is communicated with the first wiring channel 2116 .

Wherein, the circuit installation groove 2115 can be a long groove with a length extending in the circumferential direction of the collar, so as to fully expand the space of the circuit installation groove 2115 .

In addition, the wireless transmission mechanism 212 may further include a wireless charging induction coil, and the wireless charging induction coil is used for connecting with the power supply of the signal transceiving and processing circuit through a third transmission line. The wireless charging of the wireless charging device can be received by the wireless charging induction coil, so as to provide the required power to the signal transceiving and processing circuit, so that frequent replacement of the battery in the rotating shaft-mounted sensor can be avoided.

The wireless charging induction coil can be disposed in the wireless transmission mechanism 212 in the following manner 1 or manner 2.

Mode 1: The first reel 2121 is provided with two annular wiring slots 2123, the two annular wiring slots 2123 are independent of each other, and the wireless charging induction coil is arranged on the first reel 2121 in the corresponding ring routing slot 2123 on the

Mode 2: The wireless transmission mechanism 212 includes a second wire reel 2126. The second wire reel 2126 is a ring-shaped structure made of insulating material and has a ring-shaped clamping structure 2122 on the inner edge and a ring-shaped wiring groove 2123 on the outer edge. , the annular clamping structure 2122 of the second wire reel 2126 is used for fitting with the corresponding annular clamping groove 2114 of the collar 2111, and the annular wiring groove 2123 of the second wire reel 2126 is used to arrange the wireless Charge induction coil.

Although the number of reels in the first method is small, the wireless charging induction coils and the wireless communication induction coils are often arranged close together, which is inconvenient for the setting of the signal receiving module 22 and easily causes interference. Therefore, the above-mentioned method 2 is more recommended.

Preferably, the first spool 2121 and the second spool 2126 are respectively disposed at both ends of the collar 2111 opposite to each other. In this way, the wireless charging induction coil and the wireless communication induction coil can be farther away to reduce mutual interference, and at the same time, the setting of the circuit installation slot 2115 is facilitated, and the heat dissipation of the signal receiving and transmitting processing circuit is facilitated.

In addition, the first spool 2121 and/or the second spool 2126 may be formed by splicing two half-ring structures 2127, and the splicing surface between the two half-ring structures 2127 and the two half-ring bases 2112 are aligned between the butt surfaces. In this way, the assembly between the first spool 2121 and/or the second spool 2127 and the collar 2111 can be facilitated.

In the rotary shaft mounted sensor of the current embodiment, each semi-annular structure 2127 is directly injection-molded on the corresponding semi-annular base 2112 , that is, the semi-annular base 2112 is used as a part of the injection molding mold of the semi-annular structure 2127 to realize the injection molding of the semi-annular base 2112 forming. Each half ring structure 2128 is specifically made of MC nylon (polycaprolactam) material.

In the rotary shaft-mounted sensor of the current embodiment, if the first coil 2121 and/or the first coil 2121 and/or the The second spool 2127 is cut and the cross section formed on the first spool 2121 and/or the second spool 2127 is a cross section, then the first spool 2121 and/or the second spool 2127 has a cross section. The cross-sectional shape of the annular clamping structure 2122 is earth-shaped (as shown in FIG. 4 ).

Specifically, the annular snap-fit structure 2122 of the first spool 2121 and/or the second spool 2127 is similar to adding a pair of side wings to the T-shaped head (the T-shaped head itself has a pair of side wing plates 2122 a ). plate 2122a. When the annular snap-fit structure 2122 of this form is adopted, the corresponding annular snap-in slot 2114 is more complicated. After the annular snap-fit structure 2122 cooperates with the annular snap-fit slot 2114, it can effectively prevent the first reel 2121 and/or the second reel 2127 loose.

In addition, one half-ring base 2112 of the two semi-ring bases 2112 is also provided with a sinking groove 2112a recessed on the outer cylindrical surface of the semi-ring base 2112 at the butting portion used for butt joint with the other semi-ring base 2112, Threaded connector mounting holes 2112c are provided in the sink groove 2112a and in another abutting part that is butted with the butting part where the sink groove 2112a is located. The threaded connector in the threaded connector mounting hole 2112c (here, specifically a screw) is connected with the anti-loosening mechanism connected with the threaded connector. Due to the design of the sink groove 2112a, the connecting piece does not need to protrude from the outer cylindrical surface of the collar 2111.

The anti-loosening mechanism may adopt any suitable structure, such as anti-loosening of hexagon socket head set screws, anti-loosening of ratchet washers and so on. The anti-looseness of the hexagon socket head set screw and the ratchet washer are the prior art.

The above-mentioned shaft-mounted fixing mechanism 211 may further include a cover plate 2118 installed on the outer cylindrical surface of the collar 2111, and the cover plate 2118 is used to cover the circuit installation groove 2115 and make the rotating shaft-mounted sensor located at the position. The entire outer surface of the wireless transmission mechanism 212 is close to a cylindrical surface. In this way, when the rotating shaft-mounted sensor rotates with the wheel shaft 112 at a high speed, a large airflow disturbance will not be generated to impact the wireless signal receiving probe 222 and the wireless charging probe 223 to affect the detection.

A sealing strip can also be installed on the edge of the circuit installation groove 2115 , and the circuit installation groove 2115 a and the outside of the cover plate 2118 are sealed by pressing the sealing strip by the cover plate 2118 .

In a specific embodiment, the cover plate 2118 is composed of two semi-annular cover plates 2119 . The two half-ring cover plates 2119 can be mounted on the outer cylindrical surface of the corresponding half-ring base body 2112 by screws.

The shape and configuration of the first reel 2121 and the second reel 2126 may be the same, or even interchangeable. A desired wiring channel may also be provided on the second wire reel 2126 .

FIG. 5 is a schematic structural diagram of a rotary shaft mounted sensor according to an embodiment of the present invention. As shown in FIG. 5 , compared with the rotary shaft-mounted sensor of the previous embodiment, any one of the two semi-annular bases 2112 is used for docking with the other semi-annular base 2112 The butt joint part is provided with a shoulder 2112b protruding from the outer cylindrical surface of the semi-annular base body 2112, the shoulder 2112b is provided with a threaded connector mounting hole, and the two butt joint parts are installed The threaded connectors (specifically, bolts, and nuts are also installed on the bolts) in their threaded connector mounting holes are connected with the anti-loosening mechanism connected with the threaded connectors.

Likewise, the anti-loosening mechanism may adopt any suitable structure, such as the anti-loosening of the hexagon socket head set screw, the anti-loosening of the ratchet washer, and the like.

In the rotary shaft-mounted sensor of the current embodiment, due to the existence of the shoulder 2112b, the entire outer surface of the rotary shaft-mounted sensor outside the wireless transmission mechanism 212 is not a complete cylindrical surface. When the rotary shaft-mounted sensor rotates with the wheel shaft 112 at a high speed , the airflow generated by the shoulder 2112b will have a certain impact on the wireless signal receiving probe and the wireless charging probe in the control signal receiving module 22 .

FIG. 6 is a schematic structural diagram of a rotary shaft-mounted sensor according to an embodiment of the present invention. As shown in FIG. 6 for the rotary shaft mounted sensor, the cover plate 2118 adopts a metal ring wound around the collar 2111 . After winding, one end of the metal ring covers the other end and is locked on the collar 2111 by screws.

The specific structure of the signal receiving module is as follows.

As shown in FIG. 1 , the signal receiving module 22 includes a cantilever support 221 , the rear part of the cantilever support 221 is mounted on the bogie frame 12 and the front part extends toward the signal acquisition module 21 , a wireless signal receiving probe 222 is installed at the front of the cantilever support 221 , and the wireless signal receiving probe 222 and the wireless communication induction coil 2121 maintain a set distance. When the wireless transmission mechanism 212 includes a wireless charging induction coil, a wireless charging probe 223 is also installed on the front of the cantilever support 221 , and the wireless charging probe 223 maintains a set distance from the wireless charging induction coil.

As noted above, the above-mentioned signal receiving module 22 may include an independent controller, which may be deployed on the vehicle. Some processors, memories, communication interfaces, etc. in the signal receiving module 22 may be deployed in the controller, and the controller may be used to control the wireless signal receiving probe 222 and the wireless charging probe 223 in the signal receiving module 22 . In addition, the result generating module can also receive the information sent by the signal receiving module 22 through the controller. The controller is generally connected to the wireless signal receiving probe 222 and the wireless charging probe 223 respectively through cables. Therefore, a cable fixing structure 224 can be provided on the cantilever support 221 to prevent the cable from being vibrated by the cantilever support 221 and being connected to the cantilever. The bearing 221 is damaged due to friction. The cable fixing structure 224 may adopt a cable sleeve, a clip, and the like.

FIG. 7 is a schematic structural diagram of a cantilever support according to an embodiment of the present invention. As shown in FIG. 1 and FIG. 7 , the cantilever support 221 includes a plurality of plate-shaped structures welded and/or cast (that is, the plurality of plate-shaped structures may be welded, cast or partially welded to each other) Partially cast) formed bracket; the bracket includes: a first plate structure 2211, a second plate structure 2212, a third plate structure 2213, a fourth plate structure 2214 and a fifth plate structure 2215.

The first plate-shaped structure 2211 is disposed along a first plane, the first plane is a vertical plane, and the normal of the first plane points to the signal acquisition module 21; the second plate-shaped structure 2212 The third plate-shaped structure 2213 is disposed along the third plane and is connected to the front side of the first plate-shaped structure 2211 along the second plane, which is horizontal and perpendicular to the first plane. Connected to the front side of the first plate-shaped structure 2211 and the right side of the second plate-shaped structure 2212, the third plane is a vertical plane and is respectively perpendicular to the first plane and the second plane ; The fourth plate-shaped structure 2214 is arranged along a fourth plane and is connected to the front side of the first plate-shaped structure 2211 and the left side of the second plate-shaped structure 2212, and the fourth plane is a vertical plane and are respectively perpendicular to the first plane and the second plane; the fifth plate-shaped structure 2215 is arranged along the fifth plane and is connected to the rear side of the first plate-shaped structure 2211 and is close to the first plate The upper end of the second plate-shaped structure 2211, the fifth plane is a horizontal plane and is perpendicular to the first plane; the front end of the second plate-shaped structure 2212 is used to fit the wireless signal receiving probe 222 and the wireless charging probe 223. The first plate-shaped structure 2211 is adapted to be connected with the side positioning platform 121 on the bogie frame 12 through the fastening bolts installed perpendicular to the first plane. The fifth plate-shaped structure 2215 is used to fit and connect with the top surface positioning platform 122 on the bogie frame 12 through the fastening bolts installed perpendicular to the fifth plane, and the fifth plate-shaped structure 2215 is also provided with a The surface positioning platform 122 is snap-fitted with a snap-fit structure, and the snap-fit structure can at least limit the fifth plate-shaped structure 2215 forward, backward, and downward.

The above-mentioned cantilever support 221 is specially designed according to various working conditions of the bogie frame, meets the requirements of static strength and fatigue strength, can realize long-term and stable support for the signal receiving module 22, and is convenient for the wireless signal receiving probe in the signal receiving module 22. 222. The arrangement and installation of the wireless charging probe 223 and the cable. The side positioning platform 121 and the top surface positioning platform 122 on the bogie frame 12 can be used to facilitate the installation of the cantilever support 221 . The stability of the cantilevered support 221 is improved by the snap connection structure.

Wherein, the clamping structure specifically includes a positioning groove 2215a disposed on the bottom plane of the fifth plate-shaped structure 2215 and extending in the left-right direction, and the positioning groove 2215a is used for connecting with the positioning platform 122 disposed on the top surface. The positioning flange 122a on the upper part is snap-fitted.

Wherein, the upper and lower edges of the third plate-shaped structure 2213 and/or the fourth plate-shaped structure 2214 are arc-shaped so that the width of the third plate-shaped structure 2213 and/or the fourth plate-shaped structure 2214 Gradually shrink from back to front.

Wherein, weight reduction holes 2216 are arranged on the first plate-shaped structure 2213 and/or the second plate-shaped structure 2214 . In addition, reinforcing ribs 2217 are also connected between the first plate-shaped structure 2211 and the second plate-shaped structure 2212 .

In addition, the front left or right side of the second plate-shaped structure 2212 is provided with a wireless charging probe installation platform 2212a and a wireless signal receiving probe installation gap 2212b on the side of the wireless charging probe installation platform 2212a. The front part of the second plate-shaped structure 2212 is provided with a wireless signal receiving probe installation platform 2212c in the wireless signal receiving probe installation notch 2212b.

In this way, the wireless charging probe 223 is installed on the wireless charging probe installation platform 2212a, and the wireless signal receiving probe 222 is installed on the wireless signal receiving probe installation platform 2212c, so that the front end working part of the wireless signal receiving probe 222 is located on the wireless charging probe The side and rear of the front-end working part of the 223 can reduce the interference of wireless charging on wireless signal transmission.

The front end working part of the wireless charging probe 223 can be provided with a magnet. When the wireless charging induction coil rotates, the magnetic field lines of the magnet can be cut by the wireless charging induction coil or the magnetic field strength of the magnet can be changed to generate an induced current on the wireless charging induction coil. , to achieve the purpose of wireless charging.

The content of the present invention has been described above. Those of ordinary skill in the art will be able to implement the present invention based on these descriptions. Based on the above contents of this specification, all other embodiments obtained by persons of ordinary skill in the art without creative work shall fall within the scope of patent protection.

Claims (9)

1. a wheel-rail force wireless detection device, is characterized in that, comprises: a signal acquisition module, the signal acquisition module is used to obtain a wheel strain signal installed on the wheel of the bogie of the rail vehicle, and send it to the signal acquisition module through a signal transmission line; a signal acquisition module, the signal acquisition module is configured to be installed on the axle between the wheel pairs of the bogie to rotate synchronously with the axle, and wirelessly transmit the acquisition signal to the signal receiving module; a signal receiving module, the signal receiving module is configured to be installed on the bogie frame of the bogie on the side of the wheel axle, and wirelessly receive signals sent by the signal acquisition module; a result generating module, which is used to process the information received by the signal receiving module, and generate a wheel-rail force detection result; Wherein, the signal acquisition module transmits the signal through a wireless communication induction coil in the signal acquisition module that is coaxially arranged with the wheel shaft and rotates synchronously with the wheel shaft; Moreover, the signal receiving module has a wireless signal receiving probe that maintains a set distance from the wireless communication induction coil; The signal acquisition module adopts a rotating shaft-mounted sensor, and the rotating shaft-mounted sensor includes: A shaft-mounted fixing mechanism, the shaft-mounted fixing mechanism includes a collar, the collar is formed by butting two semi-annular base bodies through a connecting piece and forms a collar hole for tightly fitting with the axle, the two The semi-annular bases are both provided with annular clamping grooves, and after the two semi-annular bases are butted, the annular clamping grooves between them are butted to form annular clamping grooves, and at least one semi-annular base in the collar is provided with a circuit installation groove; A wireless transmission mechanism, the wireless transmission mechanism includes a first wire reel and the wireless communication induction coil, the first wire reel is an annular structure made of insulating material, and the inner edge is provided with a ring-shaped clamping structure and the outer edge is A ring-shaped wiring groove is provided, the ring-shaped clamping structure of the first wire reel is used for clamping and fitting with the corresponding ring-shaped clamping groove of the collar, and the annular wiring groove of the first wire reel is used for laying the Wireless communication induction coil; Wherein, the circuit installation slot is used to install a signal transceiving and processing circuit. is connected with the wireless communication induction coil through a second transmission line. 2 . The wheel-rail force wireless detection device according to claim 1 , wherein the signal receiving module comprises a cantilever support, and the rear part of the cantilever support is mounted on the bogie frame, so the The front part of the cantilever support extends toward the signal acquisition module, and the wireless signal receiving probe is installed on the front part of the cantilever support; Wherein, the cantilever support includes a bracket formed by welding and/or casting from a plurality of plate-shaped structures, and the bracket includes: a first plate-shaped structure, the first plate-shaped structure is disposed along a first plane, the first plane is a vertical plane, and the normal of the first plane points to the signal acquisition module; a second plate-shaped structure, the second plate-shaped structure is disposed along a second plane and connected to the front side of the first plate-shaped structure, and the second plane is a horizontal plane and is perpendicular to the first plane; A third plate-shaped structure, the third plate-shaped structure is disposed along a third plane and connected to the front side of the first plate-shaped structure and the right side of the second plate-shaped structure, and the third plane is vertical to the plane and perpendicular to the first plane and the second plane, respectively; A fourth plate-shaped structure, the fourth plate-shaped structure is arranged along a fourth plane and connected to the front side of the first plate-shaped structure and the left side of the second plate-shaped structure, and the fourth plane is vertical to the plane and perpendicular to the first plane and the second plane, respectively; a fifth plate-shaped structure, the fifth plate-shaped structure is disposed along a fifth plane and is connected to the rear side of the first plate-shaped structure and is close to the upper end of the first plate-shaped structure, and the fifth plane is a horizontal plane and perpendicular to the first plane; Wherein, the front end of the second plate-shaped structure is adapted to be connected with the wireless signal receiving probe, and the first plate-shaped structure is used for connecting with the steering wheel through fastening bolts installed perpendicular to the first plane. The side positioning platform on the frame frame is adapted and connected, and the fifth plate-shaped structure is adapted to be connected with the top positioning platform on the bogie frame through the fastening bolts installed vertically with the fifth plane, so The fifth plate-shaped structure is also provided with a snap-fit structure for snap-fit with the top positioning platform, and the snap-fit structure can at least make the fifth plate-shaped structure move forward, backward and downward. limit. 3 . The wireless detection device for wheel-rail force according to claim 2 , wherein in the bracket, the clamping structure comprises a positioning recess extending along the left-right direction on the bottom plane of the fifth plate-shaped structure. 4 . a groove, the positioning groove is used for snap fit with the positioning flange provided on the positioning platform on the top surface; And/or, in the bracket, the upper and lower edges of the third plate-shaped structure and/or the fourth plate-shaped structure are arc-shaped, so that the third plate-shaped structure and/or the fourth plate-shaped structure The width of the structure gradually decreases from back to front; And/or, in the bracket, weight reduction holes are arranged on the first plate-shaped structure and/or the second plate-shaped structure; And/or, in the bracket, a reinforcing rib is connected between the first plate-shaped structure and the second plate-shaped structure. 4 . The wheel-rail force wireless detection device according to claim 1 , wherein the signal acquisition module conducts charging through a wireless charging induction coil in the signal acquisition module that is coaxially arranged with the axle and rotates synchronously with the axle. 5 . Wireless charging; In addition, the signal receiving module also has a wireless charging probe that maintains a set distance from the wireless charging induction coil. 5 . The wireless detection device for wheel-rail force according to claim 4 , wherein the signal receiving module comprises a cantilever support, and the rear part of the cantilever support is mounted on the bogie frame, so the The front part of the cantilever support extends toward the signal acquisition module; In addition, the wireless charging probe is installed on the left or right side of the front of the cantilever support, and the wireless signal receiving probe is installed on the front of the cantilever support and is located at the front of the wireless charging probe. On the side, the front-end working part of the wireless signal receiving probe is located at the side and rear of the front-end working part of the wireless charging probe. 6 . The wireless detection device for wheel-rail force according to claim 1 , wherein the wireless transmission mechanism further comprises a wireless charging induction coil, and the wireless charging induction coil is used for transmitting and receiving signals with the signal through a third transmission line. 7 . The power supply of the circuit is connected, and the wireless charging induction coil is arranged in the wireless transmission mechanism through the following methods one or two; Mode 1: The first reel is provided with two annular wiring slots, the two annular wiring slots are independent of each other, and the wireless charging induction coils are arranged in corresponding annular slots on the first reel in the wiring slot; Mode 2: The wireless transmission mechanism includes a second wire reel, the second wire reel is an annular structure made of insulating material, and an annular clamping structure is arranged on the inner edge and an annular wiring groove is arranged on the outer edge. The annular clamping structure of the disc is used for clamping and fitting with the corresponding annular clamping slot of the collar, and the wireless charging induction coil is arranged in the annular wiring slot of the second wire disc. 7 . The wheel-rail force wireless detection device according to claim 6 , wherein the first reel and the second reel are oppositely disposed at both ends of the collar respectively; 8 . And/or, the first spool and/or the second spool are formed by splicing two half-ring structures, and the splicing surface between the two half-ring structures and the two half-ring bases the butt surface alignment; And/or, if the first spool and/or the second spool are cut with a plane defined by the center line of the collar hole and a radial line perpendicular to the center line at the same time. If the cross section formed on the first spool and/or the second spool is a cross-section, the cross-sectional shape of the annular clamping structure of the first spool and/or the second spool is an earth-shape. 8 . The wireless detection device for wheel-rail force according to claim 1 , wherein any one of the two semi-annular bases is provided with a protruding portion on the butt joint portion used for butt joint with the other semi-annular base. 9 . A shoulder on the outer cylindrical surface of the semi-annular base body, the shoulder is provided with a threaded connector mounting hole, and the two butt joints are connected to each other through the mounting hole installed in their threaded connector. a threaded connection piece and the anti-loosening mechanism connected with the threaded connection piece are connected; Alternatively, one of the two semi-annular bases is provided with a sinking groove recessed on the outer cylindrical surface of the semi-annular base at the butt joint part used for butt joint with the other semi-annular base, and the sinking groove and A threaded connector mounting hole is provided in another abutting part that is butted with the butting part where the sink is located, and a threaded connector installed in their threaded connector mounting holes is used between the two butt joints that are butted to each other. and the anti-loosening mechanism connected with the threaded connection piece is connected. 9 . The wireless detection device for wheel-rail force according to claim 1 , wherein: the wireless transmission mechanism is arranged at the end of the collar; the shaft-mounted fixing mechanism further comprises a device installed outside the collar. 10 . A cover plate on the cylindrical surface, the cover plate is used to cover the circuit installation slot and make the entire outer surface of the rotary shaft-mounted sensor outside the wireless transmission mechanism to be a cylindrical surface.

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